A particle of specific charge q/m = pi C...

A particle of specific charge `q/m = pi C kg^-1` is projected from the origin toward positive x-axis with a velocity of `10 ms^-1` in a uniform magnetic field `vec B = -2 hat k T.` The velocity `vec v` of particle after time `t=1/12 s` will be (in `ms^-1`)

`5[hati +sqrt(3)hatj]`

`5[sqrt(3)hati +hatj]`

`5[sqrt(3)hati -sqrt(3)hatj]`

`5[hati +hatj]`

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